Brake



July 12, 1927.

P. BASTIEN BRAKE Filed om. '4. 192s 2 sheets-snee: 1

atroz ma July 12, 1927.

P. BASTIEN BRAKE Filed Oct. 4. 1923 2 Sheets-Sheet 2 I l -n---mu-lmmtion of the brake to the drum with which it,

Patented July 12, 1927.

UNITED STATES PATENT OFFICE.

PAUL BASTIEN, or cLEvluND, Omo, AssIeNOn ro BENnIx BRAKE conm, OE"

CHICAGO, ILLINOIS, A cOnrOnA'rION OE ILLINOIS. I

Application mea 0mm 4.1923. serial no. 066,514.

This invention'relates to brakesmechanism for motor. vehiclesand has forone of its objects the provision of a brake having vthe vproperty ofself-action, that is, theapplicacooperates tends to increase thepressure between the brake and the drum to increase effectiveness of thebrake.

Another object of the invention is to'provide a brake of the self-actingtype, as above described, in which the degree of application may benicely controlled by the operator of the vehicle. A further object ofthe invention is to provide a brak'e mechanism of the type referred.

to which will be especially adapted for modern methods of manufacturingon an economical basis. Y

A further object ofthe invention is to pro vide a brake of simpleconstruction, the working parts of-which may be readily replaced whenworn.

Other objects of the invention and the features of novelty will beapparent from the following description, taken in connection with theaccompanying drawings, of which:

Figure 1 indicates a side elevaton of a wheel having my inventionapplied thereto, certain parts being shown in section;

Fig 2 is a composite view, a part of the igure being an elevation of thewheel shown in Fig. 1 and the .remainder of the figure being a sectionon thev line 2-2 of Fig. 1;'

Fig. 3 is a view similar to'. Fig. 2 but showing another form of theinvention, cer-4 tain parts being shown in section on the Aline 3-3 ofFig. 4; and 4 Fig. 4 is a section on the line 4-4 of eferrin lto theform of the invention illustrated 1n Figs. 1 and 2, 10 indicates an axlehousing, 11 the drive shaft therein, and 12 a lwheel mounted at-one endof. theA housing. A brake drum 13 is ,secured to the wheel 12, accordingto the usual custom, and has in cooperation therewith, the brake shoes14 and 15.' A brake spider 16, secured'to the axle housing as by therivets 17, has one end of the shoe 14 pivotally connected therewlth, asindicated at 18. The spider 16 has a bearing 19 for the shaft 20 whichcarries a cam 21 for actuating the shoe 15. The shoe 15 has a slot 22therein to receive the supporting pin 23 that is carried by lthe spider16, the shape of the slot permitting the shoe 15 the' to be moved w theright in Fig. 1, against I .16 and has its otherA arm 28 connected with'one end of thel shoe 15 by `a pivot pin 29 which engages with the .slot2 8 in the arm 28, thereby forming a sliding connection between the shoe15 and the, arm 28. Springs 30 and 31 having their outer ends' resectively connected with the shoes 14 a 15 and their inner ends with` thespiderl, serve to withdraw the shoes 14 and 15 from engagement with thebrake drum. l y

An arm 32 on the shaft l20 is connected with a brake lever on thevehicle body (not shown) for the purposeof actuating the brake. When thelever 32 is actuated to rotate the cam 21 against the shoe 15,the'latter is moved to the right, in Fig. 1,y into engagement with theinterlorfof the vdrum 13 and, as soon as engagement with the drum iseffected, the shoe 15 tends to travel with the drum in the direction ofthe arrow'in Fig. 1. This movement ofthe shoe 15 swin the aforesaid bellcrank lever to lthele because of the connection between 'the arm 28 andthe shoe 15, and the shoe 14 is then the movement of the shoe 15 andforce the latter against the brake' drum; The tendency for the shoe 15to rotate with the brake drum effects the ap licationof the shoe A14 to.the drum and t e pressure with which self-acting in that the brakingeectOf thel the clrcumferential shoe 14 is governed by drag on the shoe 15.

In the form of the invention illustrated in Figs. 3- and 4 thereissecured to the housing 10 a bearing member 33 on which' the hub 34- losof the pair of arms 35 is rotatably mounted.

Thevarms 35'are spaced apart and have their.

outer ends connected w1th the shoe 15 by the pivot pin 36. The brake sider 37 carries a'stud 38 on which one en of the shoe 14 is pivotallmounted,as in the construction first descrlbed; The spider 37 alsocarries the bearing member 19 for the shaft 20 and the latter carriesthe cam 21for actuating the shoe 15. The spider 37 also carries the pin39 which projects through -a slot 40 in the shoe and supports the latterout `of engagement with the drum 13. A spring 41 has one end connectedwith the spider 37, the

other end with the brake shoe 15 and tends to hold the latter out ofengagement with the `nectionbetween-the link l45 and the pin 44` permitsan adjustment of the shoe 14 toward or away from the brakeidrum.

In the o 'eration of the construction illus- Atrated in` .igs. 3 and 4,the rotation of the cam 21 forces the shoe 15 to the right, in`Fig.

` 4, and the engagement of Athis shoe with the drum causes t in thedirection of the arrow in Fig. 4. This 'movement' of the shoe 15 effectsa slight rotation of the arms 35 and their hub 34, .and the link 45forces the shoe 14 against the brake drum. In this case, the pm 44, on

account of its pivotal mounting in theI arms 35, provides a 'nd oftoggle action between the link 'and the arms 35 which results in anincrease of the pressure, with which the shoe 14 is appliedto the drum,over the circumferential dra of the drum on theshoe 15. A lstud pin 4operating in a circumferential slot 48 in the hub 34, Serves as a means-1 of limiting'thel swinging movement of the -arms 35.

`From the foregoing it ,will be apparent that the shoes 14 and 15 may bereadily removed and replaced in case of wear and that the partsgenerally are of simple construction and accessible for adjustment andinspection.

Having thus described my invention, what- I claim 1s: l

1. In brake mechanism, the combination of a brake drum, a plurality ofbrake shoes cooperatin with the interior thereof, a relativelyv lixeanchorage for one of said shoes, a movable' arm arranged to swing about.a relatively vfixed fulcrum and tol which .the other of said shoes isconnected, means for actuating the last-meiioned shoeto engage e shoetomove with the drum -actuating the last-mentioned Ashoe to engage itwith said drum, a pivot on said arm, and

a link connectingsald pivot and the firstmentioned shoe and whereby theshoe is caused to engage said vdrum by the movement of the arm. 4

3.- In brake mechanism, the combination of a brake drum, a plurality'ofbrake shoes ar.-

ranged end to end and engageable with the drum, torque-taking meansanchoring one ofthe shoes, a brake-slipplyingl device acting on4 theother shoe, and power-multiplying means separate from the brake-applyingdevice and positively connecting `the shoes and through nwhich saidother shoe acts to apply the anchored shoe. l t

. 4. Inbrake mechanism, the combination of a brake drum, a pair of brakeshoes cooperating with the interior thereof, a relatively fixedanchorage for one of said shoes, an arm arran ed to swing about the axisof said drum an pivotally connected with the other of said shoes, meansforlactuating the last-mentioned shoe to engage it with said drum,amember pivotally mounted ori-.said arm, and a link .pivot-allyconnected' with thefirst-mentioned shoe and adjustably connected withsaid member and whereby said .shoe is moved into land out of engagementwith said drum by moving said arm.

5. In a braking apparatus, the combination of ,a rotary drum, avfioating shoe for engagement therewith, a non-rotary mounting support,means for mounting said shoe to partake of limited movement` with thedrum comprising a link pivotally connected at one end to one end of theshoe and at the. other end tothe support substantially on a radial linefrom the axis of the drum vpassing through said connection with theshoe, means for forcing the shoe into engagement with thedrum', a secondshoe adapted to engage thedrum, and a thrust member connecting anintermediate part of the link to the second shoe.

6. A wheel brake comprising a; rotary drum, a. stationary support, alever pivoted on the support, a brake shoe for engaging the drumpivotally mounted on'the free end ofv the lever, actuating means forswinging the free `end of the shoe into engagement with the drum, thelever'permitting the shoe to partake of themovement of the drum, a

'with the drum, the lever permitting thev shoe to partake of themovement of the drum, a second shoe for engaging the drum pivotallymounted at one end on the support, and a member connecting the free endof the second shoe with the lever for applying the rotary tractive forceimparted to the first shoe as a brake-applying thrust on thev secondshoe.

8. A brake comprising, in combination, a drum, a shoe anchored at oneend, an unanchored shoe arranged end to end with respect to the anchoredshoe, a connection between the adjacent ends of theshoes, means forforcing the unanchored shoe against .the drum, and a springactingthrough the connection on the anchored shoe and holdlng the anchoredshoe away from the drum until the..

spring is overcome by movement of thel unanchored shoe. v

9. A brake comprising,in combination, a drum, a shoe anchored at' oneend, an unanchored shoe arran ed end to end with respect to the anchoreshoe, power-multlplying means connecting the adjacent ends of the shoes,means for forcing the unanchored shoe against the drum, and a springacting through the power-multiplying means on the anchored shoe andholding the anchored shoe away from the drum until the spring 1sovercome by movement of the unanchored shoe.

10. A brake comprising, in combination,

va drum, a shoe anchored at one end, anunanchored shoe arranged end toend with respect to the anchored shoe, a connection between the adjacentends of the shoes, means for forcing the unanchored shoe against thedrum, and a' spring` xedly mounted at one end and secured .to theconnection at the other endv and resisting brake-applying movement'ofthe anchored shoe.

11. A brake comprising, in combination, u: drum, an adjacent stationarysupport, shoes arranged end to end within the drum, a lever pivoted atits end to'one of the end to the pivotally-mounte shoes and positivelyconnected to the adjacent shoe, and a spring connected at its ends tothe support and to the lever and arranged to resist brake-applyingmovement of said adjacent shoe.

.12. A brake comprising, in combination, a drum, a pair of connectedshoes arranged within the drum and one of which is arranged to force theother 'against the drum, a cam acting on the unconnected end of said oneshoe' to apply the brake, and a guide pin passing through a slot in saidone shoe immediately adjacent the cam.

13. A brake comprising, in combination, a drum, a pair of shoes arrangedend to end and engageable with the drum, a pivotally mounted memberpivotally connected to one end of one shoe, and a link ivoted at `vonemember and pivoted at its other end to the adjacent end of the othershoe.

14. A brake comprising, inA combination, a drum, a pair of shoesarranged end to end and engageable with the drum, a leverarrangedfgenerally radially of the drum and fulcrumed at `its inner endand pivoted at its outer endto the end of one of thel shoes, and athrust member pivoted at one end to the end of the other shoe and at itsother end to an intermediate part of the lever.

1,5. yA brake comprising, in combination, a drum, a pair of shoesarranged end to endv engageable with the drum, a lever arrangedgenerally radially of the drum and fulcrumed at its inner end andpivoted at its outer end to the end of one of the shoes, and a thrust'member pivoted at one end to the end of the other shoe and at its otherend to anintermediate part of the lever, said thrust member beingadjustable for length. 16. A brake comprising, in combination, a pair ofshoes arranged end to end, one of the shoes being anchored at one endandthe other being unanchored, and a movable connection between theadjacentends of said shoes which `is adjustable to separate the l shoesmore or less to compensate for wear.

17. A brake comprising, incombination, a pair of shoes arranged end toend, a Inovable connection between the adjacent ends of said shoes whichVis adjustable to separate` the shoes more or less to compensate forwear, a. fixed pivot forming an'anchor for the unconnected end of one ofthe shoes and a brake-applyin device acting on the unconnected end o theother shoe.

In testimony whereof I aix my signature.

l PAUL BASTIEN.

llU

